/Engine/Source/Runtime/SlateCore/Public/Widgets/DeclarativeSyntaxSupport.h
Add metadata to this widget.
[WidgetArgsType](API\Runtime\SlateCore\Widgets\TSlateBaseNamedArgs\WidgetArgsType) & AddMetaData ( [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [ISlateMetaData](API\Runtime\SlateCore\Types\ISlateMetaData) > InMetaData )